Objectively Evaluating Short-Stroke Motion Systems in Helicopter Flight Simulation

As helicopter flight simulation transitions toward eXtended Reality (XR) training devices, integrating short-stroke motion systems offers cost-effective, compact alternatives to traditional Full Flight Simulators (FFSs). However, the evaluation and tuning of such motion systems remain largely subjective, despite their importance in mitigating simulator sickness and enhancing training effectiveness. This paper introduces an objective evaluation framework to assess the performance and limitations of short-stroke motion systems in XR helicopter simulators. Using a servo-based 6 degree-of-freedom platform with a classical washout algorithm, the framework employs frequency-domain analysis via the Objective Motion Cueing Test (OMCT) and time-domain analysis of representative helicopter maneuvers. Results reveal that short-stroke systems are well-suited for cueing low-frequency, sustained accelerations and slow rotational movements, but struggle with high-frequency content due to motion envelope constraints. The study provides actionable insights into optimizing cueing strategies and informs recommendations on the effective use of short-stroke motion systems in helicopter flight simulation training.